Why do engines have low efficiency?
At low speeds, gasoline engines suffer efficiency losses at small throttle openings from the high turbulence and frictional (head) loss when the incoming air must fight its way around the nearly closed throttle (pump loss); diesel engines do not suffer this loss because the incoming air is not throttled, but suffer ” …
Is heat in the ocean low quality energy?
Energy that is diffused, dispersed, and low in temperature is considered low-quality energy because it is difficult to gather and use for productive purposes. The heat stored in the oceans, for instance, is immense but hard to capture and use, so it is low quality.
Which of the following does thermal energy not depend on?
It will decrease because increasing an object’s temperature decreases its thermal energy. It will increase because increasing an object’s temperature increases its thermal energy. It won’t change because an object’s thermal energy does not depend on its temperature.
What three things does the amount of heat energy depend on?
The thermal energy of an object depends on three things: 4 the number of molecules in the object 4 the temperature of the object (average molecular motion) 4 the arrangement of the object’s molecules (states of matter). The more molecules an object has at a given temperature, the more thermal energy it has.
Does temperature depend on mass?
Temperature does not depend upon the mass of an object. The thermal energy of a substance is a measure of the total kinetic energy of its particles. Therefore, the total number of particles contained in an object, or its mass, is a factor that determines how much thermal energy an object has.
What are two factors that determine the thermal energy?
The thermal energy of an object depends on its temperature and mass. The higher the temperature of the substance, the more thermal energy it has.
What is the equation for thermal changes in energy?
5.13 use the equation: change in thermal energy: ΔQ = m × c × ΔT.